The Healthline article "Mediterranean Diet 101: A Meal Plan and Beginner’s Guide" provides an overview of the Mediterranean diet, emphasizing its focus on fruits, vegetables, whole grains, legumes, nuts, and healthy fats like olive oil. It suggests limiting red meat, processed foods, and added sugars. The article highlights potential health benefits, including weight management, heart health, and diabetes prevention. Regarding brain health, the article notes that the Mediterranean diet may benefit brain health and prevent cognitive decline. However, it does not provide specific details or evidence supporting this claim. Healthline is generally considered a credible source, but the lack of detailed evidence in this article suggests that while adopting the Mediterranean diet could be beneficial for overall health, its direct impact on brain health and cognitive performance is not thoroughly substantiated here.